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We study a mm-wave wireless network deployed along the roads of an urbanarea, to support localization and communication services simultaneously foroutdoor mobile users. In this network, we propose a mm-wave initialbeam-selection scheme based on localization-bounds, which greatly reduces theinitial access delay as compared to traditional initial access schemes forstandalone mm-wave base station (BS). Then, we introduce a downlinktransmission protocol, in which the radio frames are partitioned into threephases, namely, initial access, data, and localization, respectively. Weestablish a trade-off between the localization and communication performance ofmm-wave systems, and show how enhanced localization can actually improve thedata-communication performance. Our results suggest that dense BS deploymentsenable to allocate more resources to the data phase while still maintainingappreciable localization performance. Furthermore, for the case of sparsedeployments and large beam dictionary size (i.e., with thinner beams), moreresources must be allotted to the localization phase for optimizing the ratecoverage. Based on our results, we provide several system design insights anddimensioning rules for the network operators that will deploy the firstgeneration of mm-wave BSs.

Beamwidth Optimization and Resource Partitioning Scheme for Localization Assisted mm-wave Communications